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      <title>1、RocketMQ_基础介绍 - 交互式测验</title>
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              <h1>1、RocketMQ_基础介绍 - 交互式测验</h1>
              <p>检验你对文档内容的理解程度</p>
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  {
    "question": "根据文档，与Kafka相比，RocketMQ在处理需要确保消息与本地业务操作原子性的复杂业务场景时，具备的一个关键优势是什么？",
    "options": [
      "拥有更强的水平扩展能力",
      "单机吞吐量（TPS）远高于Kafka",
      "原生支持事务消息",
      "主要依赖Topic分区进行消息过滤"
    ],
    "correctAnswerIndex": 2,
    "explanation": "文档对比表格明确指出，RocketMQ支持事务消息，而Kafka主要支持异步复制。事务消息是确保消息发送与本地数据库操作等业务行为形成一个原子操作的关键，这使得RocketMQ在金融、电商等对数据一致性要求高的场景中更具优势。",
    "source": "文档中「2. 与其他消息队列的对比优势」->「vs Kafka: 性能、可靠性、功能特性对比」部分",
    "hint": "在对比表格中，请关注“可靠性”和“消息类型”这两行，RocketMQ提供了一种Kafka所没有的特殊消息类型。"
  },
  {
    "question": "在“典型应用场景分析”中，哪一个场景最能体现RocketMQ事务消息“确保跨系统操作的一致性”的核心价值？",
    "options": [
      "电商秒杀活动中的流量削峰",
      "支付系统与订单系统的状态同步",
      "用户注册后发送欢迎邮件",
      "分布式系统的日志聚合分析"
    ],
    "correctAnswerIndex": 1,
    "explanation": "事务消息的核心作用是解决分布式事务问题，即确保消息的发送与本地事务（如数据库操作）要么同时成功，要么同时失败。支付系统与订单系统的状态同步是一个典型的分布式事务场景，必须保证支付成功后，订单状态的更新消息一定能被可靠发送，反之亦然。",
    "source": "文档中「3. RocketMQ的核心特性与适用场景」->「典型应用场景分析」->「数据一致性」部分",
    "hint": "思考一下，在哪个场景下，如果本地操作成功了但消息没发出去，会导致严重的业务数据不一致问题？"
  },
  {
    "question": "关于RocketMQ的消息存储机制，以下描述哪项是正确的？",
    "options": [
      "CommitLog按顺序存储所有消息的物理内容，而ConsumeQueue作为逻辑队列，存储指向CommitLog的索引。",
      "ConsumeQueue存储了消息的完整内容，以方便消费者快速拉取。",
      "CommitLog和ConsumeQueue都按主题（Topic）进行物理文件隔离，以提高查询效率。",
      "IndexFile是消费消息的核心文件，记录了每个消费者的消费进度。"
    ],
    "correctAnswerIndex": 0,
    "explanation": "RocketMQ采用了存储与索引分离的设计。所有消息的实际内容都顺序写入到CommitLog文件中以获得极致的写入性能。而ConsumeQueue则像是每个Topic下每个队列的“目录”，它不存储实际消息，只存储一个固定大小的条目，包含消息在CommitLog中的物理偏移量等索引信息，从而为消费者提供了逻辑上的消息队列视图。",
    "source": "文档中「4. 分布式消息系统的基本概念与原理」->「存储与投递机制」->「消息存储」部分",
    "hint": "文档中提到了一种“将数据存储与索引分离”的设计，这是为了什么目的？"
  },
  {
    "question": "RocketMQ默认提供的消息传递语义是什么，这要求消费者在应用层面需要注意什么？",
    "options": [
      "精确一次（Exactly once），应用层无需额外处理。",
      "最多一次（At most once），消费者需要处理消息丢失的可能。",
      "至少一次（At least once），消费者需要处理可能重复的消息。",
      "尽力而为（Best effort），不保证消息一定能送达。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "文档明确指出，RocketMQ默认提供“至少一次”的消息传递语义。这是通过其内部的重试机制来实现的：当消息处理的任一环节出现失败，系统会尝试重新操作以确保消息不丢失。但这也可能导致在某些异常情况下（如消费者成功消费但确认信息丢失），消息被重复投递，因此消费端需要具备幂等性处理能力。",
    "source": "文档中「4. 分布式消息系统的基本概念与原理」->「消息传递语义(至少一次、最多一次、精确一次)」部分",
    "hint": "为了确保消息的可靠性而不丢失，系统最常见的保证策略是什么？这种策略可能会带来什么副作用？"
  },
  {
    "question": "根据文档的“选型建议”，如果一个金融交易系统既要求极高的吞吐量，又必须支持事务消息来保证数据一致性，那么最理想的选择是哪个消息队列？",
    "options": [
      "RabbitMQ",
      "ActiveMQ",
      "RocketMQ",
      "Kafka"
    ],
    "correctAnswerIndex": 2,
    "explanation": "文档在“选型建议与决策因素”部分综合对比了各个消息队列的特点。明确指出，当业务场景“需要事务消息、延时消息、消息轨迹等特性”时，应选择RocketMQ。同时，RocketMQ也具备与Kafka相媲美的高吞吐量能力，非常适合对性能和功能丰富度都有高要求的场景。",
    "source": "文档中「2. 与其他消息队列的对比优势」->「选型建议与决策因素」部分",
    "hint": "查阅文档中的“功能需求”选型建议，哪个消息队列被明确推荐用于需要事务消息的场景？"
  },
  {
    "question": "根据文档中的“版本演进历史”，像“事务消息”和“SQL过滤”这样的重要企业级特性是在哪个版本中被增加的？",
    "options": [
      "4.2.0",
      "3.x 版本",
      "5.0.0",
      "4.0.0-incubating"
    ],
    "correctAnswerIndex": 0,
    "explanation": "文档的“版本演进历史”部分清晰地列出了每个主要版本的新增功能。其中明确提到，“4.2.0：增加了事务消息、SQL过滤等企业级特性”，这是RocketMQ功能走向成熟的一个重要里程碑。",
    "source": "文档中「1. RocketMQ的起源与发展历程」->「版本演进历史」部分",
    "hint": "请在版本演进列表中，找到首次提及“事务消息”的那一行。"
  },
  {
    "question": "RocketMQ为消费者提供了灵活的消息过滤机制。以下哪项最全面地描述了文档中提到的过滤方式？",
    "options": [
      "只支持基于Topic进行分区，消费者订阅整个Topic。",
      "仅支持基于消息属性（Tag）的精确匹配过滤。",
      "支持基于Tag的简单过滤和基于SQL92表达式的复杂过滤。",
      "仅支持基于SQL92的复杂过滤，不支持简单过滤。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "文档在“关键技术特性详解”以及与Kafka的对比中都提到了RocketMQ强大的消息过滤能力。它不仅支持通过为消息设置Tag（标签）进行简单的分类过滤，还支持更强大的、在Broker端执行的SQL92表达式过滤，让消费者可以根据消息的属性进行复杂的条件筛选。",
    "source": "文档中「3. RocketMQ的核心特性与适用场景」->「关键技术特性详解」->「灵活的消息过滤」部分",
    "hint": "文档在描述消息过滤时，提到了两种不同的技术手段，一种基于标签，一种基于结构化查询语言。"
  }
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                '<div class="score-card">' +
                '<h3>得分</h3>' +
                '<p>' + correctCount + ' / ' + totalQuestions + '</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>正确率</h3>' +
                '<p>' + accuracy + '%</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>错误率</h3>' +
                '<p>' + errorRate + '%</p>' +
                '</div>' +
                '<div class="score-card score-details">' +
                '<table>' +
                '<tr><td>正确</td><td>' + correctCount + '</td></tr>' +
                '<tr><td>错误</td><td>' + wrongCount + '</td></tr>' +
                '<tr><td>未答</td><td>' + skippedCount + '</td></tr>' +
                '</table>' +
                '</div>' +
                '</div>' +
                '<div class="report-actions">' +
                '<button id="review-btn">回顾测验</button>' +
                '<button class="primary" onclick="location.reload()">再试一次</button>' +
                '</div>' +
                '</div>';

            let reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }
            quizContentEl.insertAdjacentHTML('beforeend', finalScoreHtml);
            document.getElementById('review-btn').addEventListener('click', reviewQuiz);
        }

        function reviewQuiz() {
            const reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }

            document.querySelector('.quiz-body').style.display = 'block';
            document.getElementById('quiz-footer').style.display = 'flex';
            
            currentQuestionIndex = 0;
            loadQuestion();
            updateNavigationButtons(); // Ensure nav buttons are correctly displayed
        }

        // Event Delegation for options
        optionsListEl.addEventListener('click', (event) => {
            if (event.target && event.target.matches('li.option-item')) {
                // Check if the question has already been answered
                if (userAnswers[currentQuestionIndex] === null) {
                    const selectedIndex = parseInt(event.target.dataset.index, 10);
                    selectOption(selectedIndex);
                }
            }
        });

        prevBtn.addEventListener('click', goToPreviousQuestion);
        nextBtn.addEventListener('click', goToNextQuestion);
        hintBtn.addEventListener('click', showHint);
        
        // 初始加载
        loadQuestion();
      </script>
    </body>
    </html>
  